HERSTELLUNGSVERFAHREN EINES FASERMATERIALS, DAS MIT THERMOPLASTISCHEM POLYMER IN EINER WIRBELSCHICHT VORIMPRÄGNIERT IST

摘要

The invention relates to a method of manufacturing a prepreg fibrous material comprising a continuous fiber material and a thermoplastic matrix, wherein said prepreg material is made of one and a plurality of unidirectional tapes and where said method comprises a step pre-impregnation of said fibrous material in the form of one or more wicks (81a) by said thermoplastic matrix in the form of powder, said pre-impregnation step being carried out dry in a tank (20) comprising a fluidized bed (22) comprising a smooth fitting piece (82), and said wick comprising up to 2.5% by weight of size, said wick (81a) being in contact with the surface of said smooth fitting piece ( 82), and the control of the rate of said thermoplastic matrix in said fibrous material being carried out by controlling the residence time of said fibrous material in the powder and by constant control of the tension of said wick (81a ) when it enters the fluidized bed.